Low Engine Power: Correction

Remove restrictions.

Remove restriction and/or replace filter.

See the TESTS W/CODES - 6.5L article.

Check fuel return system.

Check fuel delivery system.

Remove and replace fuel.

Check EGR system.

Check compression and valve lift.

Check fittings, and replace as required.

Remove restriction and/or replace nozzle.

Repair or replace turbocharger assembly.

Check transmission operation.